Rat dams exposed repeatedly to a daily brief separation from the pups exhibit increased maternal behavior, decreased anxiety and altered levels of receptors for estrogens (ERα, ERβ), oxytocin and serotonin (5-HT1A) in their brain - Stamatakis, A.; Kalpachidou, T.; Raftogianni, A.; Zografou, E.; Tzanou, A.; Pondiki, S.; Stylianopoulou, F. (Psychoneuroendocrinology, 2015)